Justin’s Musical Director and Guitarist Dan Kanter tells HollywoodLife.com that Justin, 18, dedicated his song “One Less Lonely Girl” to Avalanna at the show.

“Justin dedicated “One Less Lonely Girl” to Avalanna [on Sept. 29]. There was a touching picture montage during the song and instead of choosing a “lonely girl” as he usual does, Justin placed flowers on a empty seat. It was very emotional for all of us. She was precious.”

Watch the tribute below:

Justin’s director Alfredo Flores tweeted, “That was the best OLLG we’ve ever had :'(” after the show, and Dan retweeted the sentiment.

Justin tweeted about Avalanna twice over the weekend, saying: “Big day today. Tonight is for my angel. #mrsbieber,” on Sept. 29, before the show.

After the concert, Justin tweeted, “Goodnight Avalanna. Tonight was for u. I love u.”

Justin shared his grief with fans on twitter when he first heard about Avalanna’s passing.

“Just got the worst news ever. one of the greatest spirits i have ever known is gone. please pray for her family and for her,” he wrote, adding “please show respect to her and her family. say a prayer for her and for them. i miss her.”